limit the model translation language to english by default. Add the settings for translated languages.
add missing...space
clear map thumbs logic
Merge pull request #1765 from simod/map-cleanup

clear map thumbs logic
changed temporal extent fields to DateTime
fixed temporal extent formatting in the xml template
fixed some pep8 errors reported by flake8
added datetime support for temporal extent fields in layers, maps and documents
Merge branch 'ricardogsilva-fix#1746'
Updated changelog for version 2.4a23
Upgrade to gsconfig 0.6.11